OWC Gemini Thunderbolt 3 Dock and Dual-Drive RAID Enclosure

BH #OWTB3DKP2D • MFR #OWCTB3DKP2D
OWC Gemini Thunderbolt 3 Dock and Dual-Drive RAID Enclosure
Key Features
  • 2 x 2.5"/3.5" SATA III Drive Bays
  • Thunderbolt 3 | USB Type-A | DisplayPort
  • Gigabit Ethernet | UHS-II SD Card Reader
  • Supports RAID 0, 1, JBOD, and SPAN
The Gemini Thunderbolt 3 Dock and Dual-Drive RAID Enclosure from OWC / Other World Computing will help you organize your digital life. With dual drive bays and multiple connectivity options, you'll have plenty of room to duplicate footage, create and manage archives, or render and process effects.
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OWC Pro Overview

The Gemini Thunderbolt 3 Dock and Dual-Drive RAID Enclosure from OWC / Other World Computing will help you organize your digital life. With dual drive bays and multiple connectivity options, you'll have plenty of room to duplicate footage, create and manage archives, or render and process effects.

OWC built this dock with two SATA III drive bays that can accommodate 3.5" hard drives, as well as 2.5" hard drives and SSDs. Compatible with macOS 10.14, 10.15, and 11.x, plus Windows 10 and Windows Server 2016, connectivity options include two 40 Gb/s Thunderbolt 3 ports, each of which deliver up to 27W (9V / 3A) of power, two 5 Gb/s USB 3.2 Gen 1 Type-A ports, one DisplayPort, one Gigabit Ethernet port, and one UHS-II SD card reader. While one of the Thunderbolt 3 ports is used to interface with your host system, the other can be used to connect additional peripherals.

The Gemini also supports hardware RAID configurations of RAID 0, which provides performance but no data redundancy, and RAID 1, which provides data redundancy at the cost of performance. For those who do not require a RAID, JBOD and SPAN are available. JBOD lets each drive be used independently, while SPAN combines each individual drive into one large volume.

Please note that this device must be connected to your host system using Thunderbolt 3 and cannot be used as a NAS. The Ethernet port provides the computer with a network connection over Thunderbolt 3, but cannot be used to access data on the drives over the network.

General Features
Configure to Your Unique Needs
You can customize the Gemini to quickly adapt to project changes and help you stay ahead of deadlines. Install your choice of 2.5" or 3.5" HDDs or SSDs, and even combine the speed of a SSD and with the cost-effective storage capacity of a HDD. With a built-in hardware RAID, you have four drive set-up choices:
  • Non-RAID (JBOD) to keep the drives as independent volumes
  • RAID 1 (mirror) for backup reliability
  • RAID 0 (stripe) for optimal performance and maximum speed or use
  • Span to combine the drive capacities into one huge volume for extra-large storage capacities
  • Full Stream Ahead
    The Gemini features a 1Gb Ethernet port to keep you connected at speeds that leave Wi-Fi in the dust. A must-have for shared workflows and workspaces, Ethernet connectivity speeds up file transfers giving you an edge on your work in progress.
    Professional Grade = Ready to Work
    OWC understands having confidence in gear reliability is paramount to creative professionals. That's why every Gemini configured solution undergoes OWC's multi-hour drive "burn-in" performance certification procedure prior to shipping. This helps ensure it arrives operating properly and immediately ready for demanding use.
    Disconnect In One Click
    Available from OWC as a free download, their Dock Ejector software safely disconnects drives in a single click. Designed by OWC hardware and software engineers, Dock Ejector ensures all data is written before disconnection, saving time and protecting against data loss. Use it to move quickly between workstations and get the most out of your OWC Dock.
    Display Support
    One 5K display @ 60 Hz
    One 4K display @ 60 Hz
    One 4K display @ 30 Hz
    Two 4K displays @ 60 Hz
    One 4K display @ 60 Hz and one 4K display @ 30 Hz

    OWC Pro Specs

    Key Specs
    Number of Bays
    2x 2.5"/3.5"
    Inputs/Outputs
    2x USB-C Thunderbolt 3 (40 Gb/s)
    2x USB-A 3.0 / 3.1/3.2 Gen 1
    1x DisplayPort
    1x RJ45 Gigabit Ethernet
    Compatible Drive Interface
    SATA III
    RAID Support
    , RAID 0/1/JBOD
    General
    Number of Bays
    2x 2.5"/3.5"
    Inputs/Outputs
    2x USB-C Thunderbolt 3 (40 Gb/s)
    2x USB-A 3.0 / 3.1/3.2 Gen 1
    1x DisplayPort
    1x RJ45 Gigabit Ethernet
    Compatible Drive Interface
    SATA III
    Media Card Slots
    SD/SDHC/SDXC
    Form Factor
    Desktop
    RAID Support
    , RAID 0/1/JBOD
    Bridge Chipset
    Intel JHL6540
    Intel i210ASMedia AS
    Software
    OS Compatibility
    macOS 11
    macOS 10.15
    macOS 10.14
    Windows 10
    Windows Server 2016
    Security
    Security Features
    Kensington Security Slot
    Electrical
    AC Input Power
    100 to 240 VAC, 50 / 60 Hz at 2.0 A
    Power Source
    AC Adapter
    Environmental
    Operating Temperature
    41 to 95°F / 5 to 35°C
    Operating Humidity
    8 to 90%
    Storage Temperature
    -4 to 140°F / -20 to 60°C
    Storage Humidity
    5 to 95%
    Certifications
    BSMI, CE, FCC, RCM, RoHS, VCCI
    Physical
    Status Monitoring
    LED Indicator
    Cooling
    1x 3000 rpm 60 mm Fan
    Material of Construction
    Aluminum
    Dimensions
    9.4 x 5.8 x 3.3" / 23.9 x 14.7 x 8.5 cm
    Weight
    3.5 lb / 1.6 kg
    Packaging Info
    Package Weight
    5.815 lb
    Box Dimensions (LxWxH)
    13 x 10.2 x 4.8"

    OWC Pro Reviews

    Straightforward, inexpensive solution

    By Donald
    Rated 5 out of 5
    Date: 2023-02-13

    I bought this to access data from orphan drives taken from my multi-bay external hard drive. It's easy to install a drive in the enclosure and my iMac immediately recognized the drive on startup. Transfer speeds were fine for my purpose (copying files from the drive). A good solution for me at a reasonable price.

    Terrific external drive enclosure

    By William
    Rated 5 out of 5
    Date: 2022-09-18

    I am using this with an 18TB Hitachi drive to connect it to my old Mac Pro via USB 3.0. It works great. The enclosure is not very large and has stand with the non-slip base. It has been very fast and quiet, just what I had hoped it would be. And it looks nice on my desk.

    Impressive Design

    By Stephen
    Rated 5 out of 5
    Date: 2022-01-23

    Beautiful design, all-metal construction, easy to install the hard drive. I like that the hard drive mount screws have rubber grommets for noise reduction and shock absorption. I've purchased cheaper hard drive enclosures, but never again after buying this one. You get what you pay for.

    great quality,fits 18 tb ultrastar great.

    By Krzysztof
    Rated 5 out of 5
    Date: 2022-01-03

    second one i get for my son ,fits ultrastar great ,hi love it,Great buy good price.

    No longer working

    By Andrew
    Rated 1 out of 5
    Date: 2021-05-14

    Worked fine for a year. About a month ago it started disconnecting. It was once a week, then once a day, then it lasted about 30 minutes, and now it won't connect at all. Tried different hard drives, ports, cables, etc. with no luck. I recommend getting something else.

    LOUD!

    By Tae
    Rated 3 out of 5
    Date: 2021-01-15

    The drive works as advertised; however, it's LOUD on all accounts. The fan noise is loud when the drive is idle. In addition, it's even louder when the drive is working and being accessed. I would not have purchased this if I knew how loud it is!

    slowest enclosure ever!

    By Gene
    Rated 1 out of 5
    Date: 2022-10-19

    This is a nice looking enclosure, looked like a good option for external hard drive. I was very surprise to see read/write speeds only around 30 MB/s on a brand new hard drive that I put in there. This was unacceptable. When I had the same drive put in another enclosure the speeds were around 180-200 MB/s. Not a good option to buy.

    Reliable hard drive enclosure

    By Jeffrey
    Rated 5 out of 5
    Date: 2022-10-19

    This replaced an older, super cheap enclosure I bought years ago - that cheap one was never very reliable. This OWC enclosure has been rock solid and very quiet. Worth the money.

    See any errors on this page? Let us know

    How does this device compare to the Akitio ...

    How does this device compare to the Akitio Thunder 3 RAID Station? 1.) Power delivery for the Akitio device is 27W— what is it for the OWC device? 2.) Have any of the chipsets been changed— from what to what? 3.) Is the OWC RAID controller compatible with drives from the Akitio RAID controller? 4.) Would you recommend an Akitio RAID Station owner buy the OWC Pro Dock— as a second enclosure— or would it make more sense to buy a duplicate Akitio?
    Asked by: Demian
    It is essentially identical, but the firmware is much newer, I would not attempt to swap drives from an Akitio unit to an OWC unit unless you are willing to reformat the disks.
    Answered by: OWC Andy
    Date published: 2019-11-13

    will this work with Thunderbolt/USB4?

    will this work with Thunderbolt/USB4?
    Asked by: Jack
    The enclosure BH #OWTB3DKP2D • MFR #OWCTB3DKP2D can be used with Thunderbolt/USB-4 but will be limited to its Thunderbolt 3 speeds.
    Answered by: Reuben
    Date published: 2022-03-23

    can I attach a std USB drive to theUSB ports and ...

    can I attach a std USB drive to theUSB ports and do backups to the new device? Will Time Machine see all the drives?
    Asked by: Jack
    Yes, you may add a USB drive and use it normally, with Time Machine as well.
    Answered by: OWC Andy
    Date published: 2021-06-28

    How does this Mercury Elite Pro Dock compare to a ...

    How does this Mercury Elite Pro Dock compare to a new "20TB G-Raid with Thunderbolt 3". I'm planning to put 10TB Gold drives in the OWC. OWC claims to have a higher MB/s than WD. Any experience? What about fan sound? I just tested a G-Raid and was pretty quiet.
    Asked by: Giuseppe
    The numbers are accurate in my testing. The fan is not silent though, it has to move too much air to properly cool the drives.
    Answered by: OWC Andy
    Date published: 2020-03-20

    Will this work connected to a thunderbolt 2 port ...

    Will this work connected to a thunderbolt 2 port with a tb3-tb2 adapter?
    Asked by: james
    The OWC Gemini Thunderbolt 3 Dock and Dual-Drive RAID Enclosure will work with a certified Thunderbolt 3 to Thunderbolt 2 adapter like the original Apple adapter.
    Answered by: Geoffrey
    Date published: 2022-03-08

    Can a computer without usb-c connect to the ...

    Can a computer without usb-c connect to the usb3.0 and access the drives and the sd card and other ports becoming hub? Most importantly can it access the drives to dump footage to this drive with just usb3 connected to computer?
    Asked by: Christopher
    You would only be able to connect to your computer via Thunderbolt 3 or Gigabit. The USB A ports are only to connect external drives.
    Answered by: Geoffrey
    Date published: 2019-11-14

    Do the hard drives have to be identical to ...

    Do the hard drives have to be identical to support Raid 1 or can they be the identical amount of storage? If one fails and I don't have a spare drive of the same model can I add one of the same capacity?
    Asked by: Darren
    It's always best to have the identical HDD's across all the bays, for best performance and compatibility. If the HDD gets discontinued, try to match the capacity and the MB cache for best performance.
    Answered by: jessica
    Date published: 2020-02-26

    Can I connect this drive to a network switch for ...

    Can I connect this drive to a network switch for local access using the ethernet port on this unit?
    Asked by: Kiruba
    I'm sorry, but it will not work as Network Attached Storage, you must connect through a computer.
    Answered by: OWC Andy
    Date published: 2022-03-24
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